Date: Fri, 8 Dec 2006 12:49:08 +0100 From: Bernd Walter <ticso@cicely12.cicely.de> To: "M. Warner Losh" <imp@bsdimp.com> Cc: ticso@cicely12.cicely.de, freebsd-arm@freebsd.org, ticso@cicely.de Subject: Re: questions about current RM9200 state Message-ID: <20061208114906.GJ54209@cicely12.cicely.de> In-Reply-To: <20061208104227.GH54209@cicely12.cicely.de> References: <20061208015032.GF54209@cicely12.cicely.de> <20061207.205008.-432839162.imp@bsdimp.com> <20061208104227.GH54209@cicely12.cicely.de>
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On Fri, Dec 08, 2006 at 11:42:28AM +0100, Bernd Walter wrote:
> On Thu, Dec 07, 2006 at 08:50:08PM -0700, M. Warner Losh wrote:
> > In message: <20061208015032.GF54209@cicely12.cicely.de>
> > Bernd Walter <ticso@cicely12.cicely.de> writes:
> > : But I can't probe the bus from userland:
> > : [56]arm9# ./iic_probe /dev/iic0
> > : - and nothing listed.
> >
> > twi doesn't support START/STOP ioctls that you use. Hmmm, that's in
> > p4 that I've removed them because I never got that working. I also
> > think the version in -head isn't the latest, working one. I think you
> > do the same thing with a 0 byte transfer. Except we don't detect
> > NOACK quite right yet, I'm afraid. I'd expect an error each time you
> > tried.
>
> Ah - Ok, will switch to 0 Byte transfers and retest.
iic.c:
case I2CWRITE:
if (s->count <= 0) {
error = EINVAL;
break;
}
Well - it wouldn't work without NOACK detection anyway.
--
B.Walter http://www.bwct.de http://www.fizon.de
bernd@bwct.de info@bwct.de support@fizon.de
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